USNM loc. 42035 (Cambrian of the United States)

Where: Esmeralda County, Nevada (37.9° N, 117.9° W: paleocoordinates 0.7° S, 93.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Emigrant Formation, Delamaran (511.2 - 506.5 Ma)

• "Questionably Middle Cambrian. Could be unusual Lower Cambrian fauna"

•

•Waggoner 2003: "The available evidence seems to favor an Upper Cambrian age for Quasimodaspis, but there is not enough evidence at this time to date Quasimodaspis precisely."

Environment/lithology: offshore shelf; fine-grained, gray, green shale and red, yellow dolomite

• From Waggoner 2003: "In general, the Emigrant Formation represents a condensed outer shelf sequence of pelagic and hemipelagic sediments (Ketner, 1998; McCollum and Sundberg, 2000)."

Size class: mesofossils

Preservation: mold/impression

Collected by B. Waggoner and S. Richardson (2000), B. Waggoner (2001) in 2000, 2001; reposited in the USNM

Primary reference: B. Waggoner. 2003. Non-trilobite arthropods from the Silver Peak Range, Nevada. Journal of Paleontology 77:706-720 [A. McGowan/A. McGowan/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 205325: authorized by Jonathan Marcot, entered by Jonathan Marcot on 11.10.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Inarticulata
  -
Inarticulata indet.
Inarticulata indet.
"unidentified inarticulate brachiopod"
Artiopoda
 Aglaspidida - Tremaglaspididae
Quasimodaspis brentsae
Quasimodaspis brentsae Waggoner 2003